upload android base code part6

android/system/core/libsuspend/autosuspend.c

@@ -0,0 +1,100 @@
+/*
+ * Copyright (C) 2012 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#define LOG_TAG "libsuspend"
+
+#include <stdbool.h>
+
+#include <log/log.h>
+
+#include <suspend/autosuspend.h>
+
+#include "autosuspend_ops.h"
+
+static struct autosuspend_ops *autosuspend_ops;
+static bool autosuspend_enabled;
+static bool autosuspend_inited;
+
+static int autosuspend_init(void)
+{
+    if (autosuspend_inited) {
+        return 0;
+    }
+
+    autosuspend_ops = autosuspend_wakeup_count_init();
+    if (autosuspend_ops) {
+        goto out;
+    }
+
+    if (!autosuspend_ops) {
+        ALOGE("failed to initialize autosuspend\n");
+        return -1;
+    }
+
+out:
+    autosuspend_inited = true;
+
+    ALOGV("autosuspend initialized\n");
+    return 0;
+}
+
+int autosuspend_enable(void)
+{
+    int ret;
+
+    ret = autosuspend_init();
+    if (ret) {
+        return ret;
+    }
+
+    ALOGV("autosuspend_enable\n");
+
+    if (autosuspend_enabled) {
+        return 0;
+    }
+
+    ret = autosuspend_ops->enable();
+    if (ret) {
+        return ret;
+    }
+
+    autosuspend_enabled = true;
+    return 0;
+}
+
+int autosuspend_disable(void)
+{
+    int ret;
+
+    ret = autosuspend_init();
+    if (ret) {
+        return ret;
+    }
+
+    ALOGV("autosuspend_disable\n");
+
+    if (!autosuspend_enabled) {
+        return 0;
+    }
+
+    ret = autosuspend_ops->disable();
+    if (ret) {
+        return ret;
+    }
+
+    autosuspend_enabled = false;
+    return 0;
+}